AI & Machine Learning (1)

About Us

Red Cell Partners is an incubation firm building and investing in rapidly scalable technology-led companies that are bringing revolutionary advancements to market in three distinct practice areas: healthcare, cyber, and national security. United by a shared sense of duty and deep belief in the power of innovation, Red Cell is developing powerful tools and solutions to address our Nation’s most pressing problems.

ABOUT DEFCON AI

RESILIENCE IN THE FACE OF DISRUPTION. DEFCON AI is an insights company that leverages artificial intelligence, mathematical optimization, data analytics, and software engineering for resilient optimization of complex systems.
In today’s dynamically changing world, DEFCON AI’s technology aligns outcomes with operational goals, better decision making, and empowers customers to anticipate assess, and mitigate the impacts of disruptions.

About the Role

As a Data & ML Engineer you will build the data and model layer behind an AI-enabled decision-support system operating inside an accredited environment. That work covers ingestion from many source systems, resolution of incoming records against a shared data model, relevance scoring, and generation of explanations a user can act on and defend.

Three characteristics make this a substantial technical challenge. The incoming data is predominantly low-signal, which means a model can report strong overall accuracy while failing on the cases that matter most. Every output must remain traceable to the underlying sources, because a person downstream is accountable for the result. Record matching is probabilistic rather than exact, so false matches and missed matches both carry meaningful cost.

You will not be starting from an empty repository. We operate an established platform for source custody, extraction, and retrieval, and its architect is a member of this team, so existing design decisions are documented and accessible. Your work will focus on new capability rather than maintenance: record matching, calibrated scoring, and grounded generation, hardened for the target environment. We build with current tooling and expect the same, including the use of AI assistance in our own engineering practice.

This is a fully remote role with occasional travel (up to 25%) to DEFCON AI HQ, customer sites, and vendor facilities as required.

Key Responsibilities

The technical work falls into four areas. Deep expertise in all four is not expected, so please indicate where your depth lies when you apply. The engineering standards that follow apply to everyone on the team.

Data Modeling and Record Matching

Design and maintain the graph of entities, records, and the typed relationships between them
Implement probabilistic matching, including blocking, candidate generation, pairwise scoring, clustering, and threshold policy
Build deduplication and known-record suppression
Establish provenance so that every node and edge traces to the source that asserted it
Produce interface and data-flow design documentation detailed enough to serve as an implementation reference for other engineers

Scoring and Calibration

Develop relevance and priority models over large, imperfect record sets
Own calibration and threshold design, establishing what a score means rather than only how it ranks
Design abstention policy that routes uncertain and high-risk cases to a person rather than returning a confident answer
Perform feature engineering, establish baselines before introducing complex models, and conduct error analysis that accounts for the differing cost of false positives and false negatives

Retrieval and Generation

Implement embeddings, vector storage, and retrieval across a large provenance-tracked evidence base
Integrate language models through an approved managed service, and maintain a self-hosted or open-weight alternative within the same boundary
Design prompts and output schemas
Bind generated text to cited source records, and treat "insufficient evidence" as a valid system response rather than forcing a conclusion
Own model packaging, serving, versioning, and rollback

Pipelines and Source Handling

Build secure ingestion, transformation, validation, and publishing across structured, semi-structured, and unstructured sources
Implement quality checks, schema validation, lineage capture, and audit logging
Establish source drift detection so that degradation is surfaced rather than carried into the analysis
Generate statistically representative synthetic data so that development can proceed ahead of live data access

Engineering Standards

Work to the data model and standards set by the Data Lead, who approves designs and owns them through customer review
Document assumptions, caveats, transformation logic, and known limitations, since deliverables are formally reviewed
Instrument telemetry so that measurement does not require manual reconstruction
Maintain the audit trail covering recommendations, human overrides, and model versions
Submit model and pipeline changes through a gated release process rather than deploying in place

Required Qualifications

5+ years of experience in data engineering, data architecture, applied machine learning, ML engineering, or production analytics engineering
Strong Python and SQL, with demonstrated experience working with large, imperfect operational data
Experience delivering systems for sustained operational use rather than exploratory analysis alone
Routine use of AI-assisted development, with informed judgment about where it adds value and where its output requires verification
Ability to explain a technical decision to a stakeholder who must defend that decision without understanding its internals
US Citizenship Required
Active US Secret clearance. The work is performed in a controlled government cloud environment and requires a favorable investigation and CAC eligibility from the start
Elevated personnel security requirements apply to portions of this work and are discussed during screening
Willingness to travel up to 25% to customer sites, DEFCON AI HQ, and vendor facilities as required

Preferred Qualifications

Clearance: active Top Secret
Matching: direct experience applying probabilistic matching to inconsistent identity data, including names, dates, addresses, and identifiers, and familiarity with the failure modes of each. Record linkage, master data management, or identity management. Graph data modeling. PostgreSQL and pgvector or comparable. Graph algorithms applied in production
Modeling: model calibration and threshold design. Cost-sensitive learning where error types carry unequal consequences. scikit-learn, XGBoost, PyTorch
Retrieval and generation: retrieval-augmented generation in production. Prompt and output-schema design. Establishing that generated output remains grounded in its sources, and testing to confirm it. Self-hosted or open-weight model operation. Fine-tuning, adapters, or custom embeddings
Pipelines: AWS Glue, Airflow, dbt, Spark, Kafka, or NiFi. Unstructured and semi-structured document ingestion. Synthetic or representative test data generation
Environment: federal DevSecOps, RMF, ATO, or DoW cloud environments. Hardened base images. Experience advancing a pipeline from development through accreditation and deployment
Domain: sensitive federal or defense data, and work performed under privacy or comparable handling constraints
Responsible AI: documentation, model cards, fairness testing, and model monitoring. NIST AI RMF or comparable practice

What Success Looks Like

A data model that the rest of the team builds on without needing to redesign it
Matching decisions that can be explained and defended to a non-technical reviewer
Models whose miss rate is characterized, not only their overall accuracy
Generated explanations that assert no more than the sources support, with the citation path intact
Pipelines that surface problems early and trace them to a specific source
Consistent development progress, including during periods when live data is not yet available

What We Offer:

A fully remote, results-based environment
Competitive salary, bonus, and equity package
100% employer paid, comprehensive health insurance including medical, dental, and vision for you and your family
Unlimited PTO, with your manager’s approval
Flexible work environment where you manage your work day
14 weeks of fully-paid parental leave

Salary Range: $150,000-$200,000. This represents the typical salary range for this position based on experience, skills, and other factors.

Our Red Cell Partners Benefits:

For full-time roles

Career track opportunity with potential for rapid advancement with strong performance as the firm grows
100% employer paid, comprehensive health care including medical, dental, and vision for you and your family.
Paid maternity and paternity for 14 weeks at employees' normal pay.
Unlimited PTO, with management approval.
Opportunities for professional development and continued learning.
Optional 401K, FSA, and equity incentives available.
Mental health benefits are available through Tara Mind.
Cost effective GLP-1 solutions available through Crux.

We’re an Equal Opportunity Employer: You’ll receive consideration for employment without regard to race, sex, color, religion, sexual orientation, gender identity, national origin, protected veteran status, or on the basis of disability.

Applicant Data Disclosure

By submitting an application, you acknowledge that Red Cell Partners, LLC ("Red Cell") uses third-party service providers to facilitate its recruitment and hiring processes. These providers include applicant tracking systems, candidate verification platforms, and fraud detection tools (collectively, "Hiring Platforms"). Your application materials, including your résumé, cover letter, work samples, responses to application questions, and any other information you submit, may be transmitted to and processed by these Hiring Platforms for the following purposes:

Managing and administering your application throughout the hiring process;

Verifying the accuracy and authenticity of application materials, including by cross-referencing information you provide against publicly available sources and proprietary databases;
Identifying indicators of potentially fraudulent, fabricated, or materially misleading application content, including but not limited to discrepancies between submitted materials and publicly available professional profiles, geographic anomalies, and fabricated work histories.

Applications that are flagged through this process as containing indicators of fraud or material misrepresentation may be declined from further consideration. If you have questions about the status of your application or the evaluation process, please contact talent@redcellpartners.com.

Red Cell requires its Hiring Platform providers to process your information solely for the purposes described above and in accordance with applicable law. Your information will be retained only for as long as necessary to fulfill these purposes and any applicable legal obligations, after which it will be deleted in accordance with Red Cell's data retention policies.

For more information about how your data is used, please refer to our Privacy Policy and Applicant Privacy Notice.

Data & ML Engineer

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